A simple lumped parameter model is presented which is suitable for both the linear and non-linear analysis of density-wave and excursive (Ledinegg) instabilities in a boiling channel subjected to a constant pressure drop (i.e."parallel channel" boundary conditions); a lumped parameter heater dynamics model is also included . Both linear and non-linear stability analysis was performed; the marginal stability boundaries were calculated, and both subcritical and supercritical Hopf bifurcations were detected. Finally, the limits of application of the quasi-linear Hopf bifurcation theory are discussed, particularly with respect to determining the range of potentially dangerous operating conditions of the system .
A lumped parameter model for linear and non-linear analysys of excursive and density-wave instabilities in boiling channels
DI MARCO, PAOLO;
1989-01-01
Abstract
A simple lumped parameter model is presented which is suitable for both the linear and non-linear analysis of density-wave and excursive (Ledinegg) instabilities in a boiling channel subjected to a constant pressure drop (i.e."parallel channel" boundary conditions); a lumped parameter heater dynamics model is also included . Both linear and non-linear stability analysis was performed; the marginal stability boundaries were calculated, and both subcritical and supercritical Hopf bifurcations were detected. Finally, the limits of application of the quasi-linear Hopf bifurcation theory are discussed, particularly with respect to determining the range of potentially dangerous operating conditions of the system .I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
